package positionFeqW;

import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Mapper;

import java.io.IOException;

public class PositionFeqWMapper extends Mapper<LongWritable, Text, Text, IntWritable> {
    private Text position = new Text();
    private IntWritable one = new IntWritable(1);

    @Override
    protected void map(LongWritable key, Text value, Context context) throws IOException, InterruptedException {
        String line = value.toString();
        String[] fields = line.split(",");
        if (fields.length >= 5) {
            position.set(fields[4]);
            context.write(position, one);//zwmc cishu
        }
    }
}


